Insecticide



Patented -Oct. 15, 1935 UNITED STATES PATENT- OFFICE No Drawing.Application February 4, 1935, Serial No. 4,984

9 Claims. (Cl. 167-'-14) I This invention relates to the production ofsubstances for killing red spiders and their eggs and has, among itsobjects, to provide substances which, although well adapted for generaluse are particularly adapted for use on delicate plants, and are alsoadapted to killspiders and their eggs without damage to the plant,whatever the stage of growth of the plant. The invention also relates toand is applied to the production of 10 substances for killing ingeneral, including red spiders and other similar mites and alsoincluding aphids, leaf rollers, cyclamen mites, mealy bugs and others.

This application is a continuation in part of my copending applicationior lnsecticids, Se-

rial Number 587,147.

The red spider (Tetranychus telarius L.) probably causes more seriousdamage to a larger number of species of plants than almost any othergreenhouse pest. Many compounds have been recommended forexterminatin'g, or controlling red spiders; However, these compoundseither do. not kill the spider, or if they do kill, also damage theplants. The red spider seems peculiarly immune to contact insecticideswhich readily kill insects such as potato beetles, Japanese beetles,

cockroaches, tarnished plant bugs, etc. ical methods, such as sprayingwith cold water under high pressure, are not very effective, and

' generally cannot be applied when most needed,

because of the damage to the plants or danger of fungicidal diseases.The present invention provides substances which are extremely eflicientand which do not injure the plants in any way. Moreover, the discoveredproducts, herein disclosed, do-"not require high pressure spraying.

This is of particular advantage where the control is for plants such asgladioli, asters, carnations, mums, or any delicate plant. It isbelieved that the desired action for all purposes herein is principallydue to the pres- Mechaninvention,.proceed as follows: saturate 19 poundsof ammonium hydrozddsolution containing 28% ammonia, with hydrogensulfide; add one-half pound of selenium and shake until dissolved, andthen dilute to 5 gallons with water. To prepare 6 a finished spray forkilling red spiders, dilutel gallon of above with 100 to 800 gallons ofwater. Thereis no intention to limit the invention entirely to the abovespecific formula, although this formula is also claimed. It is also tobe un- 10 derstood that the amount of selenium can be varied within thelimits of solubility. Moreover, the amounts of ammonium and seleniumgivenv above, can be varied somewhat, and additional ammonia can also beadded after saturating with 15 hydrogen sulphide. About .2 gram of soapper 100 cc. of diluted liquid spray'is used as a spreader. It is to benoted that the use of too much soap or spreader will result in injuryand/or burning of the plants. 20 The use of about one-half an ounce ofsoap to the gallon gives a perfect covering on the leaves of carnatlons,gladioli, or similar foliages, which are not thoroughly wetted by oilemulsions. Soap has the advantage of not removing the fbloom 25 1. Aninsecticidecontaining ammonium selenosulphide. 30

2. A process for making a substance of the nature described whichconsists, in adding hydrogen sulphide to an ammonium hydroxide solution,and then adding selenium. w

3. Aprocess for making a substance of the na- 85 ture described whichconsists, in saturatingammonium hydroxide solution with hydrogensulphide, adding selenium and shaking until dissolved;

4. A process for making a substance of the na- 4 ture described whichconsists in saturating ammonium hydroxide solution with hydrogensulphide, adding selenium and shaking until dissolved, then dilutingwith water. j

5. A-proce'ss for making a substance of the natime described whichconsists, in adding hydrogen sulphide to an ammonium hydroxide solution,adding additional ammonia, and then addingselenium.

6. A process for making a substance of the na- 5 ture described whichconsists, in saturating ammonium hydroxide solution with hydrogen sul- Iphide, adding additional ammonia, then adding selenium.

7. A process for making a substance of. the na- I5 ture described whichconsists, in saturating am- 9. A process for making the substancedemonium hydroxide solution with hydrogen sulscribed which consists, insaturating approxiphide, adding additional ammonia, adding selenimately19 pounds of ammonium hydroxide soluum, shaking until dissolved, andthen diluting tion containing approximately 28% ammonium 5 with water. vwith hydrogen sulphide, then adding approxi- 5 8. Aprocess for makingthe substance described mately one-half pound of selenium and shakingwhich consists, in saturating approximately nineuntil dissolved, thendiluting to approximately 5 teen pounds of ammonium hydroxide solutioncongallons, with water, and finally diluting approxitainingapproximately 28% ammonium with hymately 1 gallon of the above productwith ap- 10 drogen sulphide, then adding approximately oneproximately100 to 800 gallons of water. 10

half pound of selenium and shaking until dissolved, then diluting toapproximately 5 gal- CHARLES B. GNADINGER. ions, with water.

